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US 2010/0247924 A1Published application
Curable sheet composition
AssigneeThree Bond Co., Ltd.
InventorTakashi Nemoto
Life of this patent
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Abstract
A curable sheet composition able to follow up a mold shape under the application of heat and pressure, able to polymerize and cure upon being irradiated with light, permitting an optical element molding pattern to be fixed, and comprising 50% to 94% of a polycarbonate diol-modified urethane acrylate oligomer, 5% to 40% of a (meth)acrylate containing at least one carboxyl group in each molecule thereof, and 0.5% to 5% of a photopolymerization initiator.
Claims20
A curable sheet composition being in a solid state at room temperature, capable of being liquefied and flowing upon heating, and comprising:
- (A) 50 to 94% by weight of a urethane (meth)acrylate oligomer prepared by the reaction of a polycarbonate diol (a1), a diisocyanate (a2), and a (meth)acrylate (a3) containing at least one hydroxyl group in molecule,
- (B) 5 to 40% by weight of a (meth)acrylate containing at least one carboxyl group in molecule, and
- (C) 0.3 to 10% by weight of a photopolymerization initiator.
Dependencies are inferred from the claim text.